Water-purifier.



No. 7|2,770. Patented Nov.l 4, |902.

G. MQ nAvmsorL WATER PUBIFIER.

(Appufminv mea mr. a, 1902.)

(No Model.) 2 Sheets-Shack l.

TH: Nonms amas co, morouwa. v vAsmNamN. r:4 c:4

n Patented -Nov. 4, 1902.

N0. 7|2.770. -,G. M. DAVIDSON.

WATER PUR'IFIER. (Application led Mar. 3, 1902.)

2 Sheets-Sheet 2` (No Model.)

,n .m w im? .Hm

www

iJNirnD STATES GEORGE M. DAVIDSON,

PATENT rinicn.

OF OAKPARK, ILLINOIS.

WATER-Pommes.

SPECXFCATION forming part of Letters Patent No. 712,770, dated November 4, 1902.

Appncatanvied March s, 1902 To a/ZZ whom it mag/concern.-

Be it known that LGnoRGE M. DAVIDSON, a citizen of the United States, residing at Oakpark, in the county of Cook and State of Illinois, have invented certain new and useful Improvements. in VVater-Puriers, of which the following is a specification.

This invention relates to that class of mechanisms known as Water-purifiersthat is, apparatus or mechanisms arranged to mix predetermined quantities or proportions of chemicals with feed-water preliminary to the feeding of water to a steam-boiler, so as to largely minimize the deleterious action of ordinary waters during the generation of steam, all of which will more fully hereinafter appear.

The principal object of the invention is to provide a simple, economical, and efcient water-purier. Y k

A further object of the invention is to provide a Water mixer and purifier with economical means for operating the different stirring, feeding, and mixing mechanisms.

Further objects of the invention 'will appear from an examination of the drawingsaud the following description and claims.

The invention consists principally in the combination of achemical-feed tank, stirring mechanism movably mounted therein, a discharge-.pipe in such vchemical-feed tank, a Water-supply pipe, and a tilting vessel arranged to receive the discharge of the watersupply and chemical-discharge pipes and connected with thevoperating mechanisms to operate the same by and duri-ng its movements.

The invention consists, further, in the combination of a chemical-mixing tank, achemical-feed tank connected therewith and provided wi'th a discharge-pipe, stirring mechany isms in the chemical mixing and feed tanks, a

water-supplypipe,andatiltingvesselprovided with a plurality of measuring mixing-chambers arranged to vreceive the discharge of the Water-supply and chemical-discharge pipes and connected with the dierent stirring mechanisms in theA chemical mixing and feed tanks to operate the same by and during its movements.

The invention consists, further and finally, in the features, combinations, and details Serial No. 96,491. (No model.)

ofv construction hereinafter claimed.

In the accompanying drawings, Figure lis a sectional elevation of an apparatus constructed in accordance with these improvements, taken ou line l of Fig. 2 looking in the direction of the arrow; Fig. 2, a crosssectional elevation of the same, taken on line 2 of Fig. l looking in the direction of the arrow; and Fig. 3, a sectional elevation of one of the pumps which connect the chemicalmixing tank with the chemical-.feed tank.

In the art to which this invention relates it is ivell known that most water contains more or less i'ucrusting solid matter in solution or other deleterious matter, which, if fed into steam-boilers, is during the generation of the steam generally depositedin the form of scale on the inner surface tlrereof, all of which acts to incrust the fines and crownsheet and lessen the efficiency of the boiler as Well as resulting in an extraconsumption of fuel and decrease in the life of the boiler. It is also Well known that a great many chemicals may be used and mixed with the feedwater before it enters the boiler to counteract the effects of said solids or other deleterious substances, so that the water when used will not have a deteriorating influence on the boiler.

The principal object, therefore, of this invention is to provide a suitable mixing apparatus--an apparatus which measures the chemicals and water in predetermined quantities and thoroughly mixes them before they enter the settling tank or tanks preliminary to being fed into the boiler, all of which will be more fully hereinafter set forth.

In constructing and arranging an apparatus in accordance with these improvements I provide a chemical-mixing tank ct, of the dedescribed and in contour and placed in a vertical position. This mixing-tank may be arranged underneatha chemical-supply pipe b, so that dissolved chemicals may be fed into it as deaired-.that is, chemicals which'arerst mixed in a vat and dissolved so as to form a prelirninaryv chemical mixture. It is desirable sired size and shape, preferably cylindrical IOS that after these chemicals have been preliininarily or primarily mixed or dissolved they be more thoroughly mixed together while in the chemicalmixing tank a. To accomplish this result, I provide a set of stirrers or beaters c` mounted upon a rotatable shaft cl, vertically arranged and practically coincident with the axis of the mixing-tank. This rotatable shaft at its lower end is mounted in a stepped block c in the bottom of the tank, and its first set of blades, beaters, or stirrers is arranged just above a screen f, which acts to prevent the large particles entering the space below the same. The upper part of the rotatable stirrer-shaft is provided with a bevel-gear g, meshing with a second bevelgear h on a driving-shaft hereinafter more fully described.

In order to measure and feed the chemical solution, so that it may ne mixed with the requisite quantity of water-supply and to maintain a proper head to insure the necessary uniform feed at all times, a chemicalfeed tank 7' is provided and connected with the chemical-mixing tank by means of pump mechanism 1, the spouts Z of which are arranged directly over the opening in the chemical -feed tank. This pump mechanism is composed of pumps 7c, having a common inlet 7n in the bottom part of the chemical-mixing tank directly under the screen, but has two spouts, one for each pump, arranged as above described. The single pipe connecting the pumps with the mixing-tank is provided with a gate-valve n, which may be opened or closed whenever desired. To maintain a constant or uniform head in the chemicalfeed tank, it is provided with an overflowpipe o, which leads back or returns the overfiow to the chemical-mixing tank. This chemical-feed tank is provided with a dischargepipe p, in which are arranged two valvesone a gate-valve q and the other a rotary valve 7', the gate-valve to open or close the discharge-pipe during an emergency-say for repair of the valvewhile the rotary valve is provided as a means for measuring predetermined quantities ot' chemicals, as will more fully hereinafter appear. This chemical-feed tank is also provided with stirringr or beating mechanism s, vertically arranged therein and upon a rotatable shaft t, the upper end of such shaft being provided with a bevel-pinion u, meshing with a bevel-pinion c on the driving-shaft 71 above described.

For the purpose of operating the mechanism above described, as well as for feeding and mixing the chemicals and feed-water together, a tilting water and chemical mixing vessel w is provided, substantially diamondshaped in side elevation and provided with two chambers and y, formed by a vertical transverse partition a'. This tilting vessel is pivotally mounted at the lower apex 10 of the diamond, so that as one water-chamber is filled (the chamber y) it tilts the vessel to the position shown in Fig. 2, and when such chamber is emptied and the opposite one, lled the other end of the tilting vessel is depressed and the parts assume a position opposite to that shown in Fig. 1. This tilting vessel is arranged directly underneath the dischargespouts of the chemical-feed tank and a water-supply pipe 11. completely, with the exception of at or near the upper central portion thereof, as shown particularly in Fig. 1, where such chambers are open to receive the water and chemicals, the result being that during the tipping of the vessel there is very little splash and the vessel may be operated slower, and in this manner a more uniform mixture is obtained. The ends of the vessel, or, in other Words, the apex of the Water-chamber and the lower walls thereof, are provided with a plurality of discharge-openings 12, so that when the vessel occupies the position shown in Fig. 1 the mixed waterand chemicals will iiow out therefrom in a uniform manner and into a settlingtank 13, thus giving the other chamber sufficient time to be filled before starting the return movement. When the tilting vessel is operating, particularly when one side is emptied and the other full of liquid, it would be apt to cause more or less of a shock or jar when it reaches its limit of motion. In order to prevent such a shock or jar, two dash-pots 14: and 15 are provided, one connected With each end of the tilting vessel, as shown in Fig. 1. This not only acts to preventa shock or jar, but provides for an easy or uniform motion of the tilting vessel and enables it to better accomplish its other functions as well as its mixing and discharging functions.

It is highly desirable in this class of mechanisms that means for moving the stirring or beating mechanisms, pumping mechanism, and the chemical-measuring valve be operated as economically as possible and with the simplest kind of mechanisms, for the reason that a great number of these devices will have to be used on the large railroad systems of the country, and the economy thereof It is also boxed lOO should be seriously considered; otherwise the improvements are not likely to be used to any great extent. In order, therefore, to provide a simple as Well as efficient means for operating these mechanisms, I prefer to take advantage of the power developed by and during the operations of the tilting measuring and mixing vessel. In order so to do, I provide the driving-shaft above alluded to with a sprocket-wheel 16, around which is passed a sprocket-chain 17, connected to each end of the tilting vessel, as shown in the drawings. It will thus be seen that during the tilting operations this driving-shaft is tilted first in one direction and then in the other and the beating or stirring mechanism above described operated. To operate the pump mechanism, a walking-beam 18 is provided, each side of the center of which is pivotally connected with the pump-rods 19 and 20 and each end by means of the chains 21 and 22 with the extreme ends of the tilting vessel, so that during the tilting operations of such vessel the pumps are alternately operated and a supply of chemical mixture furnished the chemical-feed tank. measuring-valve r is provided with a slotted lever-,arm 23, to which is adjustably secured a chain 24, in turn connected with each end' of the tilting vessel, as shown -in Fig. 1, and passed over idlers 25. By this arrangement it will be seen that as the vessel tilts from one side to the other the rotary valve is operated by the movement of its lever-arm 23 from one side to lthe other and thevalve opened and closed alternately or successively to supply the requisite amount of chemicals to the mixing vessel.

It will be noted that a supply of water through the Water-supply pipe may be con.

stantly furnishedthough not, perhaps, at a uniform pressure or volume-and that the peculiar measuring vessel insures a constant uniform supply of the mixture of feed-water and chemicals, for the reason that the tilting vessel cannot operate until one side is emptied, or substantially so, and the other side l'illed with the predetermined amount of Water before it can be operated, thus providing for a uniform mixture.

I claiml. In a Water-purifier, the combination of a chemical-mixing tank, a chemical-feed tank connected therewith and provided with a discharge-pipe, stirring mechanism in the chemical mixing and feed tanks, a Water-supply pipe, and a tilting vessel provided with a plurality of measuring mixing chambers arranged to receive the discharge of the watersupply and chemical-feed pipes and connected with the stirring mechanisms in such tanks to operate the same by and during its movements, substantially as described.

2. In a Water-purifier of the class described, the combination of a chemical-mixing tank provided with stirrer or beater mechanism, a chemical-feed tank provided with stirring mechanism and a discharge-pipe, pum p mechanism connecting the chemical mixing and feed tanks together, a water-supply pipe, a tilting vessel provided with a plurality v of measuring and mixing chambers arranged under the openings ofthe chemical-discharge and water-supply pipes, and means connecting the stirring and pump mechanisms with the tilting vessel to operate the same by and during the movements of the tilting vessel, substantially as described.

3. In a Water-purifier of the class described,

the combination of a chemical-mixing tank The rotary4 necting the tilting vessel with the stirring and pump mechanism and With'the measuring-valve in the chemical-discharge pipe to operate 'the same by and during themovements of the tilting vessel, substantially as described.

4. In a'water-purilierof the class described, the combination of a chemical-feed tank, a water-supply pipe, and a diamond-shaped tilting water-measu ring and chemical-mixing vessel arranged underneath the same and provided with two chambers substantially entirely closed having receiving-openings adjacent to the Water-supply and chemical-discharge pipes and at or near the upper central portion thereof and discharging-openings at or near the extreme endsr of the tilting vessel, substantially as described.

5. InaWater-purifier of the class described, the combination of a chemical-mixing tank, a chemical-feed tank provided with a discharge-pipe, a measuring-Valve in such discharge-pipe, pump mechanism connecting the chemical mixing and feed tanks together, stirring mechanism in the chemical mixing and feed tanks geared together, a tilting vessel provided with a plurality ofmeasuring and mixing ch'ambers arranged underneath the openings of the chemical-supply and water-discharging pipes, and chain mechanism connecting such tilting vessel with the gearing of the stirring mechanisms, the pump mechanism and the measuring-valve to operate the same at and during the movements of the tilting vessel, substantially as described.

b. In a Water-pu ritier of the class described, the combination of a chemical-mixing tank, a chemical-feed tank provided With a discharge-pipe, a measuring-valve in such discharge-pipe, pump mechanism composed of two reciprocatingpumpsconnecting'the chemical mixing and feed tanks together, stirring or beating mechanism in such stirring and mixing tanks geared together, a Walkingbeam connected with both of the pumps to operate the same, a tilting vessel provided with a plurality of measuring and mixing chambers arranged underneath the openings of the water-supply and chemical-discharging pipes, and chain or similar mechanisms connecting the ends of the tilting vessel with the walking-beam of the, pump mechanism, the gearing of the stirring mechanisms and the measuring-valve of the chemical-discharge pipe to operate the same by and during the movements of such tilting vessel, substantially as described.

7. In a water-purifier of the class described, the combination of a chemical-mixing tank, a chemical-feed tank provided with a discharge-pipe, a measuring-valve in such discharge-pipe, pump mechanism composed of two reciprocating pumps connecting the chem- ICO IIO

ical mixing and feed tanks together, stirring or beating mechanism in such chemical IniX- ing and feed tanks geared together, a Walking-beam connecting both of the pumps together to operate the same, a tilting vessel ical-discharge pipe to operate the same by zo provided with a plurality of measuring and and duringT its movements, and dash-pot mixing?r Chambers arranged underneath the mechanism connected with the tilting vessel openings of the water-supply and chemicalto modify its Operations, snbstantiallyas de- 5 discharging pipes, chain or similar mechanscribed.

isms connecting the ends of the tilting ve's- GEORGE M. DAVIDSON. sel with the walking-bea1nof the pump Witnesses: mechanism, the gearing of the stirring meeh- THOMAS F. SHERIDAN,

anisin and the measuring-valve of the chem- I HARRY IRWIN CROMER. 

